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y in (-oo:+oo)
-((4/9)*y) < 16 // - 16
-((4/9)*y)-16 < 0
(-4/9)*y-16 < 0
-4/9*y-16 < 0 // + 16
-4/9*y < 16 // : -4/9
y > 16/(-4/9)
y > -36
y in (-36:+oo)
(-36:+oo)
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